For the following word below, a context is provided. From the alternatives given, pick the word or phrase that is closest in meaning in the given context.
Alphanumeric: The inclusion of alphanumeric features in cellular phones has made sending SMSs very convenient.
using only alphabets
using digital codes
using both letters and numerals
Alphanumeric here means consisting of or using both letters and numerals.
So, using both letters and numerals is the correct option.