Word order of indirect question

[Felip]

Test No. incompl/elem-19 "Late Again", question 1

Do you know ......... time it is?

(a) which
(b) when
(c) what
(d) how

Test No. incompl/elem-19 "Late Again", answer 1

Do you know what time it is?

Correct answer: (c) what
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I wonder which of these questions are correct grammatically 'Do you know .... time it is?' or
'Do you know .... time is it?'

[Alan]

The question part of this sentence is Do you know and what follows is an indirect question what time it is and that explains the word order.
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English as a Second Language
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