Q: Do Sunni and Shia Muslims read the same Quraan?

Q: I am a 20 years old boy and I am suffering from urinary incontinence problem for the last 2-3 years. Please can you tell me how should I pray and read Quraan?

Q: If a person because of some disturbance missed an Aayah in Surah ​Faatihah, or one sentence in his At-Tahiyyat, does he have to make Sajdah-e-Sahw? To what extent is the Surah Faatihah and At-Tahiyyat Waajib?

Q: Is bidding halaal in Islam?

Q: With regards to Eid Salaah, in the following situations, how does a person cover up for the missed Takbeeraat:

1. If a person joined after the Takbeeraat were made, but he got the Rak'ah.

2. If he missed the first Rak'ah completely.

3. If he missed the Takbeeraat of the second Rak'ah but he made it for the Rukoo'.

4. If he missed the entire second Rak'ah.

Q: Wanted to know if I read an ayah of sajda in namaz and do it in namaz and read it again after namaz. Will the sajdah done in namaz suffice for the sajda after namaaz?

Q: Can I use interest money to build a toilet for my personal use?

Q: Who was the killer of Hazrat Hussain (radhiyallahu anhu)?

Q: I am asking this question on behalf of my friend. He is married and got 2 kids. His wife got postnatal depression and he is thinking of marrying his wife's sister so she can lookafter his kid. Is it allowed in Islam to marry one's wife's sister? 

Q: If a wife does zina with someone, does her marriage relationship remain the same with her husband?