Which Quranic Surah confirms that Quran was revealed in Ramadan?

Which Quranic Surah confirms that Quran was revealed in Ramadan?

Which Quranic Surah confirms that Quran was revealed in Ramadan?

• Al-Kahaf
• Aal-Imran
• Al-Nisa
• Al-Baqarah

ANSWER 

     (4)

• Al-Baqarah