GST on top up recharge composite applicable

yes he can opt for composition 

No , you can not  opt  composition scheme  for any service except  Restaurant  related service  

Recharge  of  Tata sky & Dish TV  is  service  and compostion scheme is not  applicable to services as mentioned above . please confirm with others also .

Yes you cannot opt for composition since its a sale of service under GST. Only Restaurant service is allowed for composition under Services.

The following people cannot opt for the scheme:

• Taxpayer supplying exempt supplies.
• Supplier of services other than restaurant related services
• Manufacturer of ice cream, pan masala, or tobacco
• Casual taxable person or a non-resident taxable person
• Businesses which supply goods through an e-commerce operator