Sentences are grammatically correct and make sense.
In the first one means:
We have as much pens as they do.
Second means:
They are as tall as us.
"tan" is the equivalent in English for "as much". The concordance is well done in both cases.
The answer is A
This is because
A) The fruits
B) The TV
C) The Mail
D) The guitar
And you can't eat any of them apart from A