DNA test karna

Q: USA me ek hospital me ek sath 2 ladies ko ek ko ladki, ek ko ladka paida hua or galti se inke tags missed ho gaye. Ab bacchon ko kaise pehchana jaye ke kisko ladki hui or kisko ladka? Masla ye hai k aaj k dour me DNA Test se jana ja sakta hai lekin Quran ki roshni me kaise pehchana jaye? 

Working in a company where the credit price is more than cash price

Q: I want to work in an electronics company that provides products on loan (12 months installments) And they take more money than the actual prize of the product. For example a product which costs 45,000 PKR (Cash) they give it at a total amount of 54,000 PKR (in installments). Can I work there? Will my earnings will be Halal?

Greeting a non-Muslim helper

Q: My nani is bedridden. She has a female Christian attendant who comes everyday in the morning and leaves at night. She wanted to know if she can say salam to her when she comes in the morning. If not, then how should she greet her when she comes? Not saying anything appears rude and cold.