Book

Refer Manish M Valechha ISCA Book (Memory Based Edition) (BEST) plus Practice Manual (The best book ever released for this subject, The book is self-explainatory.. it explaines all topics with examples, diagrams, memory codes....) refer Study Material if you have sufficient time but not actually reuired. Use with practice manual only. All tips are given in the book.. 

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ISCA boon or bane