All of the following statements are true about Juxtafoveal Retinal Telangiectasias, Except –
I think one word is missing from the question, i.e., idiopathic. If the question is about idiopathic juxtafoveal retinal telangiectasia, then the answer is `d' as in idiopathic juxtafoveal telangiectsia there are retinal telangiactases without involvement of the peripheral retina.
However if the question is about juxtafoveal retinal telangiectasia in general, than no answer is correct as all can be seen in juxtafoveal retinal telangiectasia. A typical example is coat's disease which often present with peripheral involvement.

"The condition may occur either with or without involvement of the peripheral retina. Coat's disease is often present in patients with peripheral involvement". — Atlas of fundus.

So, peripheral involvement may or may not occur in Juxtafoveal retinal telengiactasis. However, peripheral involvement does not occur in idiopathic Juxtafoveal retina telangiectasias. So, I consider that the question is about idiopathic juxtafoveal retinal telangiectasias in which peripheral involvement does not occur.
About other options

In juxtafoveal telangiectases, the telangiectasias are seen injuxta-foveal (Parafoveal) region of the macula.
Variant of Coat's disease
Associated with telangiectasias in the macula
Associated with structurally abnormal Retinal Vessels
Associated with peripheral telangiectasias