Yes, we can.

i think answer is NO, because catch block is used to catch 
the exceptions thrown

The above answer is wrong.We can absolutely throw 
exceptions in catch blocks.This is called bubbling the 
exceptions to one level higher.If catch block can not 
handle exceptions,then it can throw the exception that it 
caught, to it's caller

we can throw the exception in catch block by using throw New
Exception("Exception Message")

yes we can through exception  If catch block can not 
handle exceptions,then it  throw the exception to it's 
caller