Question

Which compound sentence is not correctly punctuated?

A.
His new watch is self-winding; it still needs a battery.

B.
His new watch is self-winding but it still needs a battery.

C.
His new watch is self-winding, but it still needs a battery

Answer 1

b

Answer 2

u should explain hun ^^^^

Answer 3

A coma is needed before adding the word 'but'.