Answer: A) 12 Explanation: The given series follows a pattern that,   4 + 32 = 4 + 9 = 1313 + 52 = 13 + 25 = 3838 + 72 = 38 + 49 = 8787 + 92 = 87 + 81 = 198    Hence, the odd man in the given number series is 12.

Answer: A) numbers of neutrons Explanation: Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.

Answer: A) 65 Explanation: The given number series is 8, 14, 24, 40, ? . It follows a pattern that, 8 8 x 1.5 + 2 = 14 14 x 1.5 + 3 = 24 24 x 1.5 + 4 = 40 40 x 1.5 + 5 = 65   Hence, the next number in the given number series is 65.

Answer: A) Directive principle Explanation:

Answer: A) Sulphur dioxide Explanation: Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans.   Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution.   In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.

Answer: A) It is set by multiple levels of the government. Explanation: General education policy is set by multiple levels of the government like Federal, state and local governments.

Answer: A) 416 Explanation: The given number series is  21 56 102 160 231 316   21      56       102        160      231       316         416    +35    +46       +58       +71      +85       +100         +11      +12       +13      +14      +15   Hence, the next number in the given number series is 316 + 100 = 416.

Answer: D) Agriculture Explanation: Agriculture would be a good example of a purely competitive industry.