'...who or who slept with...' or just '...who slept with...'?

[English_holic]

English Language Tests, Intermediate level

ESL/EFL Test #336 "English Slang Idioms (57)", question 6

"I hate it when people wash their dirty ......... in public. I don't want to hear who or who slept with John. I don't want to hear any of their personal business!" Elise said to Pauline.

(a) laundry
(b) minds
(c) cars
(d) issues

English Language Tests, Intermediate level

ESL/EFL Test #336 "English Slang Idioms (57)", answer 6

"I hate it when people wash their dirty laundry in public. I don't want to hear who or who slept with John. I don't want to hear any of their personal business!" Elise said to Pauline.

Correct answer: (a) laundry
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"...who or who slept with ..." or just "...who slept with..."?

Englishholic

[Mister Micawber]

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I think it's fine for conversation, Englishholic-- 'who or who (else)' is the idea.
.
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Native English teacher at Mister Micawber's