Christian apologists are arrogantly misleading lay Christians through irrational arguments and ignorance. Here we see a Christian apologist called James R. White (of Alpha and Omega Ministries) making an ignorant challenge as well as irrational arguments.
these apologists are making money out of presenting bad arguments to you. Research Islam with an open heart. Think for yourselves.
“In My Ummah (Islamic Nation), there shall be born Thirty Grand Liars (Dajjals), each of whom will claim to be a prophet, But I am the Last Prophet; there is No Prophet after Me. (Abu Dawood Vol 2 p. 228; Tirmidhi Vol 2 p.45)“ 
“Narrated Abu Huraira: The Prophet said, ‘The Israelis used to be ruled and guided by prophets: Whenever a prophet died, another would take over his place. There will be no prophet after me, but there will be Caliphs who will increase in number.’ The people asked, ‘O Allah’s Apostle! What do you order us (to do)?’ He said, ‘Obey the one who will be given the pledge of allegiance first. Fulfil their (i.e. the Caliphs) rights, for Allah will ask them about (any shortcoming) in ruling those Allah has put under their guardianship.’ (Translation of Sahih Bukhari, Virtues and Merits of the Prophet (peace be upon him) and his Companions, Volume 4, Book 56, Number 661)“
“Narrated Sad: Allah’s Apostle set out for Tabuk. appointing ‘Ali as his deputy (in Medina). ‘Ali said, ‘Do you want to leave me with the children and women?’ The Prophet said, ‘Will you not be pleased that you will be to me like Aaron to Moses? But there will be no prophet after me.’ (Translation of Sahih Bukhari, Book 59, Military Expeditions led by the Prophet (peace be upon him) (Al-Maghaazi), Volume 5, Number 700)“
“Narrated Ubaida: Ali said (to the people of ‘Iraq), “Judge as you used to judge, for I hate differences (and I do my best ) till the people unite as one group, or I die as my companions have died.” And narrated Sad that the Prophet said to ‘Ali, ‘Will you not be pleased from this that you are to me like Aaron was to Moses?’ (Translation of Sahih Bukhari, Book 57, Companions of the Prophet, Volume 5, Number 56)”
“Sa’d b. Abi Waqqas reported that Allah’s Messenger (may peace be upon him) left ‘Ali b. Abi Talib behind him (as he proceeded) to the expedition of Tabuk, whereupon he (‘Ali) said: Allah’s Messenger, are you leaving me behind amongst women 4nd children? Thereupon he (the Holy Prophet) said: Aren’t you satisfied with being unto me what Aaron was unto Moses but with this exception that there would be no prophet after me. (Translation of Sahih Muslim, Book 31, The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada’il Al-Sahabah), Number 5914)”
“Sa’d reported Allah’s Apostle (may peace be upon him) as saying to ‘Ali: Aren’t you satisfied with being unto me what Aaron was unto Moses? (Translation of Sahih Muslim, Book 31, The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada’il Al-Sahabah), Number 5916)“
Texts are from: http://www.answering-christianity.com/last_prophet.htm