[Gautham Siddharth]

for the reaction 2Cl_(g)  Cl_29g) the signs of ΔH and ΔS respectively are
a) +,-
b) +,+
c) -,-
d) -, +

what is the best answer ?

[Borek]

You have to show your attempts at solving the question to receive help. This is a forum policy.

[Zyklonb]

As you wrote it, the answer is:+,-.
Because that reaction will never happen in a million years under perfect conditions.
If you want to get the correct answer you may consider hitting the "Shift key" before the "9 key", as "Cl₂₉" is not a chemical, but a typo.

[Corribus]

So you think forming a bond is endothermic, then?

[Zyklonb]

Re-read my post, forming a Cl₂₉ bond is not only endothermic but impossible.
Obviously forming Cl-Cl bond is exothermic, but I was referring to the question he wrote, not the question he meant to write.