Patek is a popular and expensive brand of watches since 1920.$1920.$ Although several fake Patek watches are sold in the market, an original Patek watch can be identified from its dial, which is made of platinum and not easy to duplicate. In this case, the platinum dial of Petek watches marks its _____.$\_\_\_\_\_.$

a.$.$ potency

b.$.$ authenticity

c.$.$ efficacy

d.$.$ sensitivity

Answer rating: 100% (QA)

The detailed answer for the above question is provided below b aut... View the full answer