How many time zones are from East to West in Europe?

There are four time zones in Europe.

Explanation:

Like all continents, Europe is divided into multiple time zones. The reason for this is practicality, human health, and economy. Not all time zones occupy the same amount of territory though and the division between them is not done by longitudinal lines, but it is made by the borders of the countries, depending on which country adopted what time zone.

From east to west, there are four time zones in Europe. The easternmost is the Moscow Time Zone, then comes the East European Time Zone, Central European Time Zone, and Western European Time Zone. The Western European Time Zone is actually the one that is the basis for counting plus or minus, as this is the 0-time zone, set in accordance to Greenwich, the prime meridian.

81 is a composite number.

the awnser is a

it is not b or c