Communication barrier(s) in the international environment is (are)
(A) Loss by transmission
(B) Loss by poor retention
(C) Poor listening
(D) All of the above​

Pick up the reason for greater biological diversity at tropical latitudes (A) Availability of more solar energy (B) Tropical environments are less seasonal & more constant (C) Tropical latitudes were not subjected to glaciations (D) All the above

Nearly all plants and an overwhelming majority of animals are categorised as (A) Conformers - They can maintain a constant internal environment (B) Conformers - They cannot maintain a constant internal environment (C) Regulators - They can maintain a constant internal environment (D) Regulators - They cannot maintain a constant internal environment

Pick out the correct staments about optical fibres from the following: S1: Optical fibres are used for the transmission of optical signals only S2: Optical fibres are used for transmission of optical electrical signals S3: The intensity of light signals sent through optical fibres suffer very small loss S4: Optical fibres effectively employ the principle of multiple total internal reflections S5: Optical fibres are glass fibres coated with a thin layer of a material with lower refractive index

(a) It is not a non communicable disease (b) Spread due to conscious behaviour pattern (c) Loss of contact inhibition (d) Shows metastasis How many of the above statements are not correct about AIDS ?

Reduction involves (A) Loss of electrons (B) Gain of electrons (C) Increase in the valency of positive part (D) Decrease in the valency of negative part

They blamed their teachers(A) / of their poor performance (B) / in the Board examination(C ) / No error(D ).