Chardy
Allira as far as the 60s goes I can only speak of my own experience. The O level option list at my school could allow you to drop one or 2 of the 3 sciences (that's not acceptable now btw), you could do history or geography or both. Some people did Art, some Home Economics, others did neither. I think you had to choose from about 8 different combinations of subjects.
We had to do at least one science, I chose physics as the biology and chemistry teachers I had were a real let down and bored me with the subjects. You were also encouraged to take at leasrt one language and had to chose either history or geography, or both. Being a grammar school, there were no craft subjects( secondary moderns for those), but you could take a subject called technology, which was like applied physics.