NIACL Model Paper 5 with solutions for free online practice

Statements  Some roses are thorns.
All thorns are flowers.
Conclusions  Some roses are flowers.
(1+A = I-type)
Some flowers are roses, (conversion)
Hence, II follows.
Statements  No flower is petal
Conclusions   No petal is flower. (conversion)
Some flowers are roses.
Conclusions  Some roses are not petals.
(E +1 = 0*-type)
Hence, I does not follow.