Ascasx

We are hindu and my daughter had married to a muslim boy against our will. now my daughter(hindu girl) has done nikkah with boy through kazi also.(girl name is changed to muslim name in nikah nama,but they have not married at court yet). now somehow we have conviced boy to covert to hindu religion and do marriage through hindu marriage act so that my duaghter can be safe from triple talak and multipl marriages done in muslims normally and easily. But the muslim boy is saying that if he do marriage by hindu marriage act he will lose his minority reservation and benifits. so he says he can marry by special marriage act in which non of them have to change caste.so my question is 1.she has already done nikah through kazi so how can we again do marriage by hindu marriage act or special marriage act(claiming her as hindu only)? will it be valid? 2.If hindu girl marries muslim boy under special marriage act will she be saved in same way like in hindu marriage act(eg: boy cant leave girl without her will or by saying talak 3 times and also boy cant marry another girl while he`s married to one girl etc). 3.If muslim boy marries under hindu marriage act will he really lose his benifits such as government job reservation? becuase as much i know nobody can change he`s caste just for getting reservation so same should apply here also. I read somewhere that in special marriage act also muslim boy can leave girl just by saying talak 3 times and also can marry multiple girls at same time because the boy is still muslim and in special marriage act muslim law will be followed. Our only moto is to keep our girl safe now but as boy said we dont want to lose him his minority benifits also because it will help him getting govn job. so please suggest can we safe our daughter from muslim ritual under special marriage act or not? shall we force boy to marry under hindu marriage act only even though he may lose his job reservation under minority?