Course Rigor Question

Hello!
A quick question regarding the courses:
My son is a senior in a highly competitive Bay Area high school. He wants to drop the Physics C course just because of the teacher and his tests very hard.
My son did Regular Physics in 11th. He plans to apply for CS major.
What AP course can he take after dropping Physics C:

the options are
AP Chem
AP Bio
APphysics1 --Does this course look bad on his transcript since he took regular physics already ?
Really appreciate any advice

What level of s hook is he going for ? How much rigor does he already have ? My guess is any of the other two and they may not even be necessary.

What schools is he considering besides the UCs?

Closing duplicate thread. Feel free to answer on the other thread