DS starts sixth form in September and is trying to finalise his A level choices. He is keen on applying to Cambridge - course yet to be decided, but probably Modern Languages, or possibly Psychological and Behavioural Sciences. I know that facilitating subjects no longer exist in the way that they did, but some colleges refer to things like 'keystone subjects' which are effectively the same - and recommend that no more than one A level should be in subjects other than these. Two definite choices for A level are Music and Spanish - the third one could possibly be History, Psychology, English Lit, or English Lang. Am I right therefore that Psych or English Lang could jeopardise his chances, given that Music isn't a 'keystone subject', and therefore making two 'other subjects'?