Give reviews about Vajiram & Ravi's Forestry Optional ( for IFoS Mains ).

Anyone who have any idea about Vajiram and Ravi's Forestry Optional , kindly give reviews about the same.

Also , if anyone covered the Forestry Optional from anywhere else , kindly share their reviews as well in detail please.

Need to join a course for Forestry Optional as new to the subject. So kindly pay attention to the mater.

Thank You.