Which of the following is the widest part of the alimentary canal?

For&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">x</mi><mo>∈</mo><mi mathvariant="normal">R</mi><mo>,</mo><mi mathvariant="normal">f</mi><mo>(</mo><mi mathvariant="normal">x</mi><mo>)</mo><mo>=</mo><mo>(</mo><mi>log</mi><mo>⁡</mo><mn>2</mn><mo>−</mo><mi>sin</mi><mo>⁡</mo><mi mathvariant="normal">x</mi><mo>)</mo><mtext>&nbsp;and&nbsp;</mtext><mi mathvariant="normal">g</mi><mo>(</mo><mi mathvariant="normal">x</mi><mo>)</mo><mo>=</mo><mi mathvariant="normal">f</mi><mo>(</mo><mi mathvariant="normal">f</mi><mo>(</mo><mi mathvariant="normal">x</mi><mo>)</mo><mo>)</mo></math>, then

Let the relation R be defined in N by aRb, if 2a + 3b = 30. Then, R = ………...&nbsp;

<math><mrow><mi>f</mi><mo>:</mo><mi>N</mi><mo>→</mo><mi>R</mi></mrow></math><xml> </xml>such that <math><mrow><mi>f</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>=</mo><mfrac><mrow><mn>2</mn><mi>x</mi><mo>−</mo><mn>1</mn></mrow><mn>2</mn></mfrac></mrow></math><xml> </xml>and <math><mrow><mi>g</mi><mo>:</mo><mi>Q</mi><mo>→</mo><mi>R</mi></mrow></math><xml> </xml>such that <math><mrow><mi>g</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>=</mo><mi>x</mi><mo>+</mo><mn>2</mn></mrow></math><xml> </xml>be two functions. Then <math><mrow><mrow><mo>(</mo><mrow><mi>g</mi><mi>o</mi><mi>f</mi></mrow><mo>)</mo></mrow><mrow><mo>(</mo><mrow><mfrac><mn>3</mn><mn>2</mn></mfrac></mrow><mo>)</mo></mrow></mrow></math><xml> </xml>is equal to

If&nbsp;starch is mixed with human saliva in a test tube at a temperature of 370 C and pH 3.7,

Which of the following is the widest part of the alimentary canal?

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