mistake in submitting applications from in choos category of post

Pls help, I giving the exam of alp and loco pilot mumbai board 1/2014,my trade is welder,at the time of submitting my form ,I give a 4 choice of choos ctegory,1) loco pilot, and then othet technician where mention welder,bt now alp result declere,and now I knowing welder is not applicable for alp,
My dbt is, if I am in merit list in written exam,they send me a call letter for the post of technician,p
Pls sir tell me ,help me

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