how to use [And] [OR] in one rule

Hello every one iam new to Shaerpoint, how can i make my form Hide/Invalidate column based on the below conditions.

Below are the columns should consider for Hide and invalidate 

1. On/Off - Choice button
2. One time use / Regular - Choice button
3. Product - List look up (dropdown
4. Contact

Condition.

1. If user select On from (On/Off) column and One time use from - One time use / Regular then contact column should be visible and also contact column should be mandate
2. If user select On from (On/Off) column and from product dropdown there are so many values starts with OPQ so if a product columns contains “OTC” then contact column should be visible and also contact column should be mandate.

It will be really helpful if some one help me to solve this issue

PS : Iam using sharepoint 2013