Find the best move III

I’d think Nd7 would be a good move, if not best for white, as it saves the knight and attacks the enemy queen.

The opponent may trade bishop for knight which is commonly viewed as good for white. 
Another response after may be queen f7.

Nope! But a excellent move, nonetheless!

this might be a really dumb idea :

if you sacrifice knight on g6 so pawn takes you can start to threaten mate by playing queen h5. after c5 the bishops diagonal will be open?

i just did this because i could find no other move

Wrong! But a good move! Here's a hint look at the rooks!

I think Rd1 or Rd2

Because then you threaten to double up and pin the queen to the king, sacrificing the knight

And you go on an unstoppable attack 

It's Rd2!! brilliant move, but who can explain why?

I just

Explained

Sorry when i put that i couldn't see your explanation

Yeah that happens