In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Q: Question: In the oxaciclohexane-type conformer of sugar -D - (+) - glucopyranose: 
 Options:  <0> One of the OH- groups is axial, but the remaining substituents are equatorial. <1> The CH2OH group is axial but the remaining groups are equatorial. <2> All groups are axial. <3> All groups are equatorial. <4> The CH2OH group is equatorial but the remaining groups are axial.

A: chemistry
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Q: Question: The determined (or systematic) errors that can be committed in an analytical method: 
 Options:  <0> They cause the data to spread more or less symmetrically with respect to a mean value. <1> They have a definite value and an assignable cause, giving rise to a bias in the results of a series of measures. <2> They come reflected in the precision of a measurement. <3> They are never attributable to instrumental measuring devices. <4> They result in outliers, which differ greatly from the others in a set of duplicate measures data.

A: pharmacology
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Q: Question: In HPLC and under ideal conditions, the chromatographic peaks should have the shape of Gaussian peaks with perfect symmetry, although in reality, the peaks are not perfectly symmetrical and can present fronts and tails. The asymmetry factor: 
 Options:  <0> It is used to measure the relative retention of the two components of a sample so that in perfectly symmetrical compounds it is 0. <1> It is used to measure the degree of symmetry of a peak and is defined at the peak width corresponding to 10% of the peak height. <2> It is a parameter that is calculated by measuring the width at the half-height of the chromatographic peak. <3> It relates to each other two successive chromatographic peaks, so that an asymmetry factor 1 indicates a total resolution of them. <4> It is a parameter related to the symmetry of the peaks, defined at a height equal to 10% of the width thereof.

A:
chemistry
****