which a levels to take?

Answers by date: 3 records in 3 sources, newest first; the answers above are the current ones. The advice was refined (2018), never reversed, in these records.

date	who	answer	source
2018-05-29	Ali	The best three A-levels for medicine, Ali says, are biology, chemistry and maths.	Live Stream - Hangout 00:24:13
2018-05-07	Ali	Ali says always take a fourth A-level if you have the chance: most Cambridge students have at least four, and having only three is unusual there.	Live Q&A + Hangout - Bank Holiday vibes - Ali Abdaal, Cambridge medical student 00:21:12
2018-05-01	Ali	Ali advises always taking four A-levels if you can: three is suboptimal in his opinion.	First Live Hangout + Rapid-fire Q&A 00:06:48