Statement: Bottled water companies 'X' and 'Y' ruled out any contamination of their products, saying these had been produced under rigorous quality control regime meeting all standards set by the Bureau of Indian Standards (BIS). Assumptions: I. Production under rigorous quality control regime gives trustworthy results. II. BIS has been entrusted with the responsibility to set quality benchmarks.

• if only assumption I is implicit.
• if only assumption II is implicit.
• if either I or II is implicit.
• if neither I nor II is implicit.