Explanation:

Time Division Multiple Access (TDMA) : a digital wireless telephony transmission technique. TDMA allocates each user a different time slot on a given frequency. TDMA divides each cellular channel into three time slots in order to increase the amount of data that can be carried.

Advantages of TDMA

• TDMA can easily adapt to transmission of data as well as voice communication.
• TDMA has an ability to carry 64 kbps to 120 Mbps of data rates.
• TDMA allows the operator to do services like fax, voice band data, and SMS as well as bandwidth-intensive application such as multimedia and video conferencing.
• Since TDMA technology separates users according to time, it ensures that there will be no interference from simultaneous transmissions.
• TDMA provides users with an extended battery life, since it transmits only portion of the time during conversations.

Hence option 2nd is correct.