[Grammar] I was hoping to see sarah.

[ushakranthi]

I was hoping to see sarah.
a.But she couldn't meet us.that was a pity.
b.But she couldn't meet us,it was a pity.
c.But she couldn't meet us,What was a pity.
d.But she couldn't meet us,which was a pity.

Is option a correct?

 

[bhaisahab]

I was hoping to see sarah.
a.But she couldn't meet us.that was a pity.
b.But she couldn't meet us,it was a pity.
c.But she couldn't meet us,What was a pity.
d.But she couldn't meet us,which was a pity.

Is option a correct?

With a comma instead of a full stop, it's possible. Option "d" is correct if you use correct spacing.