CBDC is related to the RBI, what is the D in this

Statements:                          Only boys are girls.

Statements:       All plots are lands.

                                All lands are houses.

Statements:

Only a few Radio are Gramophone

No Gramophone are TV

Only a few TV is Recorder

Conclusions:

Statements:

Some animal are mammal.

Some mammal are herbivore.

No herbivore is carnivore.

Conclusions:

Statements: All stairs are marbles.

All marbles are tiles.

Some tiles are irons.

Conclusions: I. Some tiles are stairs.

Statements: All actors are directors.

Some directors are dancers.

All dancers are writers.

Statements:

All Railway is Great

Only a few Great is Cheap

No Cheap is Platform

Conclusions:

Statement: No cooler is a fan.

All fans are ACs.

No AC is a button.

Conclusion: I. No fan is a button.

Statements : All cards are colours.

Some charts are cards.

Some papers are charts.