Whats next after ngo?

Further information, The complaint is on husband and relatives of husband by wife.

1) A Call from Police ? if Yes, What will he say to me, Whether they will order me to appear on the same time at police station for arrest along with name of people mentioned in complaint?

First counselling then harass you.

2) Police will come to our home for arrest? Will it be immediate arrest?

Yes

3) What can be done to avoid arrest? Is it possible? What if they don't give me time and send me behind bar immediately?

Notice bail

In section 498-A complaint cases, in the most states, the police first start mediation process.  If the mediation process fails, then only FIR will be registered.  The intervening period between the failure of mediation and registering FIR, you can approach the Sessions Court for anticipatory bail. 

In section 498-A complaint cases, in the most states, the police first start mediation process.  If the mediation process fails, then only FIR will be registered.  The intervening period between the failure of mediation and registering FIR, you can approach the Sessions Court for anticipatory bail.