What is needed is/are ...

[Tan Elaine]

What is needed is a pair of scissors.
What is needed are scissors.
What is needed is a pen.
What is needed are pens.

Are all the sentences correct?

Many thanks.

(Hi to fellow members who responded to my earlier post. I'm sorry I've re-posted the query as I found a question mark in the first two sentences. They were not needed.

Once again, my apologies.)

[Coli]

It would be about right .

[Tan Elaine]

Thanks, Coli.