A. 5
B. 6
C. 7
D. 8

Following are the six most famous books of Hadith:
All Muhadith (Hadith writers) were Persian.

1. Sahih Bukhari
Name: Muhammad ibn Ismail al-Bukhari
Born: Bukhara, 196 A.H
Died: Samarqand, 256 A.H

Sahih al-Bukhari is a collection of hadith compiled by Imam Muhammad al-Bukhari (rahimahullah). His collection is recognized by the overwhelming majority of the Muslim world to be the most authentic collection of reports of the Sunnah of the Prophet Muhammad (صلی الله علیه و آله وسلم). It contains over 7500 hadith (with repetitions) in 97 books.

2. Sahih Muslim
Name:Abul Hassan Muslim AL Hajjaj
Born: Nishapur, 206 A.H
Died: Nishapur, 25th Rajib 261 A.H

3. Jame Tirmizi
Name: Abu Esa Muhammad AL Trimidhi
Born: Termez, Iran, 209 A.H
Died: Termez, Iran, 279 A.H

4. Sunan Abu Dawood
Name:Abu Daud Suleiman bin Ash’ath
Born:Sistan,Iran, 202 A.H
Died: Sistan, Iran, 275 A.H

5. Sunan Al Sughra
Name: Abu adul Rahman al-Nasai
Born: Turkmenistan, 215 A.H
Died: 303 A.H

6. Sunan ibn Maja
Name: Abu Abdullah Mohammad ibn Yazid
Born: 201 A.H
Died: 273 A.H