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Answer
From the given hints the word is “WHATSAPP”. First four letters W, H, A, T i.e, what is a question. 2nd, 3rd, 4th letters H, A, T i.e, hat, protects our head. 5th, 6th, 7th letters S, A, P i.e, the sap is an IT company (SAP Software & Solutions is one of the largest vendors of enterprise resource planning software and related enterprise applications) and last two letters are same i.e, P, P.
