The correct answer is A. Baddi.
Baddi is a town in the Solan district of Himachal Pradesh, India. It is known for its industrial area, which is home to a number of companies, including HDPE pipe companies.
Barotiwala is a town in the Mohali district of Punjab, India. It is located near the border with Himachal Pradesh. Barotiwala is home to a number of industries, but there are no HDPE pipe companies located there.
Parwanoo is a town in the Solan district of Himachal Pradesh, India. It is a popular tourist destination, known for its scenic beauty. Parwanoo is not home to any HDPE pipe companies.
Paonta Sahib is a town in the Sirmaur district of Himachal Pradesh, India. It is home to a number of temples, including the Paonta Sahib Gurudwara. Paonta Sahib is not home to any HDPE pipe companies.