Which of the following is an example of intangible asset ?

A. More than 7
B. Less than 7
C. Less than 6
D. More than 6

A. Filtration process is used
B. Biological action is used
C. Neither A. nor B.
D. Both A. and B.

A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm

A. 0.112 kg in suspension
B. 0.112 kg in solution
C. 0.225 kg in solution
D. Both A. and C. of above