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Hello

Would you help me with grammar, the singular and plural?
I came across the similar sentences below.

1) What kinds of TV programs do you watch most?
2) What kind of music shows do you watch? Pop music, rock music, classical music?

I'm not sure which to choose , " kind" or "kinds" when I make sentence like these.
Why does 1) use "kinds" and 2) use "kind"? Or is either one incorrect?

Thank you.
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We often just match the singular or plural (kind or kinds) indiscriminately to the noun after of.

kinds of programs, kind of music, kinds of people, kind of sugar, ...

But that is not required. Sometimes we have only one kind of something in mind, so we use kind. Sometimes we have more than one kind of something in mind so we use kinds.
If the question is what kind of, the one who asks expects the answer to consist of one kind.
If the question is what kinds of, the one who asks expects the answer to consist of more than one kind.

CJ
Comments  
I do not know about any rule that the two sentences should break.

what kinds of means there are programs of different kinds.
What kind of means the programs may vary in nature.
Students: We have free audio pronunciation exercises.
(a) This kind of charge (NOT CHARGES) is very high compared with similar charges in the United States.

(b) Books of this kind are hard to find.

(c) There should be more childcare centres for these kinds of children.

Sentence (1): What kinds of TV programs ( programmes - Br Eng ) do you watch most? ( related to sentence c )
Sentence (2) What kinds of music shows do you watch? Pop music, rock music, classical music? ( related to sentence c )
 CalifJim's reply was promoted to an answer.