Aroma in Onion is due to the presence of 

Statements:

Some dogs are lions.

All lions are tigers.

All lions are leopards.

No leopard is a monkey.

Statements:

Some guests are hosts

All hosts are invitations

No invitation is a decoration

Conclusion :

Statement:

Only Peripheral are Computer.

Some Hardwares are Peripherals.

Some Hardwares are Devices.

Statements: Some reds are blues.

All blues are greens.

Some greens are not yellows.

Statements-: 

Some Sons are daughter.

A few daughters is Mother

Many mothers is father

At most Sons are child.

. Statements: 

No ring is a diamond 

All diamonds are pearl 

Some bangle are pearl 

Conclusions: 

Statements:       All mobile are laptop.

All laptop are phone.

Conclusions:       I. All laptop are mobile.

Statements:

All charts are graphs.

Some graphs are data.

Some data are details.

Conclusions:

Statements: 

All aeroplanes are trains.

Some trains are chairs. 

Conclusions:

I. Some aeroplanes are chairs.

Statement:

Some A are B

Only a few B are C

No A is D

Conclusion:

I.At least some A are C

II. All B are C is a possibility

III. No D is C